Question

Let’s say I have this enum:

[Flags]
enum Letters
{
     A = 1,
     B = 2,
     C = 4,
     AB = A | B,
     All = A | B | C,
}

To check if for example AB is set I can do this:

if((letter & Letters.AB) == Letters.AB)

Is there a simpler way to check if any of the flags of a combined flag constant are set than the following?

if((letter & Letters.A) == Letters.A || (letter & Letters.B) == Letters.B)

Could one for example swap the & with something?

Answer 1

If you want to know if letter has any of the letters in AB you must use the AND & operator. Something like:

if ((letter & Letters.AB) != 0)
{
    // Some flag (A,B or both) is enabled
}
else
{
    // None of them are enabled
}